U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

42,735 verified records
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State directory

Connecticut ZIP Codes

Complete postal directory, details, and geographic map for the State of Connecticut.

State ZIP Code City County Area Codes
CT 06470 Newtown Fairfield County 203, 475, 860, 959
CT 06471 North Branford New Haven County 203, 475
CT 06472 Northford New Haven County 203, 475, 860, 959
CT 06473 North Haven New Haven County 203, 475
CT 06474 North Westchester New London County 860
CT 06475 Old Saybrook Middlesex County 860, 959
CT 06477 Orange New Haven County 203, 475
CT 06478 Oxford New Haven County 203, 475
CT 06479 Plantsville Hartford County 203, 475, 860, 959
CT 06480 Portland Middlesex County 860, 959
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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.